Transfluxor circuit



Jan. 2, 1968 v H. REINER 3,362,020

TRANSFLUXOR CIRCUIT Original Filed May 29, 1959 3 Sh ets-She t, 1

INVENTOR.

H.REINER myw 3 Sheets-Sheet 2 Original Filed May 29, 1959 INVENTOR.

H. REINER Jan. 2, 1968 H. REINER TRANSF'LUXOR CIRCUIT 3 Sheets-Sheet 5Original Filed May 29, 1959 INVENTOR.

BY H. REINER ArfwP/vEy United States Patent Ofi ice 3,362,020 PatentedJan. 2, 1968 ABSTRACT OF THE DISCLOSURE In a memory device for thesetting of a transfluxor, a

single apertured magnetic core with a rectangular hysteresis loop isprovided as a driver core and is connected in such a way thatresaturation pulses are capable of being applied to one input winding ofthe driver core and in that one output winding of this driver coretogether with one control winding of the transfluxor are connected in acircuit closed in at least one direction of current flux so that aconstant voltage versus time integral will be set to the control windingat least during the one resat-uration of the driver core.

Cross reference to related applications This application is acontinuation of application Ser. No. 816,788, filed May 29, 1959, andnow abandoned, for a Transfiuxor Circuit.

The present invention relates to a transfluxor circuit, particularlysuitable for the setting-up of storage circuits, logical networks andthe like. The employment of the transfluxor with such types of circuitsis already known. It bears the advantage that the informations as storedin the transfluxor are capable of being read without being destroyed.However, the employment of the transfluxor also is entailed by a numberof difiiculties which are due to the mode of operation of thetransfluxor.

The transfluxor in its most simple form consists, as is shown in FIGURE1, of a ferrite core 1 having two borings 2 and 3, by which the yokes I,II, III are constituted. Usually the dimensions are chosen such that thecross-section of the yoke I is equal to the sum of the cross-sections ofthe yokes II and III. The yoke I carries at least one control winding Svia which the transfluxor can be set or blocked respectively. However,there may also be provided separate control windings for Setting andBlocking. T-he yoke IH carries a call-up winding e and a readout windinga. Only in the set, but not in the blocked condition will thetransfiuxor supply an output signal. In this case the reading can beeffected with the aid of an alternating voltage or by the application ofindividual pulses of alternating polarity.

The mode of operation of the transfluxor is based on the reciprocalaction of the two magnetic circuits surrounding the two borings 2 and 3.When in the blocked condition the core material in all three of theyokes is at the same point of remanence, by which a resaturation of thecircuit around the boring 3 with the yokes II and III is renderedimpossible. For effecting the setting of the transfluxor the circuitaround the boring 2 is partly resaturated. In the set condition the corematerial in the yoke I is partly in the one, and partly in the otherpoint of remanence, whereas in the yokes II and HI there exist oppositeremanence conditions.

Accordingly, the transfluxor is a flux-sensitive circuit element.

It is obvious that the setting of the transfluxor places high demands onthe dosage of the current, which is to be fed to the control winding.This is particularly the case when in the practical applications alsothe temperature influence has still to be considered, because thetemperature dependence of the coercive force has an efiect upon thesetting accuracy.

There also exists the possibility of eliecting the flux variation, whichis necessary for the setting purpose, by the application of apredetermined voltage versus time integral, as is customary e.g. in thecase of the step-by-step setting of counting reactors. Also in this casethe temperature has an unfavorable influence.

The present invention is based on the problem of providing an almosttemperature-insensitive transfiuxor circuit not requiring a specialdimensioning of the currents or pulses respectively, which are necessaryfor the operation, this transfiuxor circuit especially being suitablefor the construction of storages, counting cores and shift registers.

According to the invention this problem is solved in that for thesetting of the transfluxor a single-apertured magnetic core with arectangular hysteresis loop is provided as a driver core and isconnected in such a way that resaturation pulses are capable of beingapplied to one input winding of the driver core, and in that one outputwinding of this driver core, together with one control winding of thetransfluxor are connected in a circuit closed in at least one directionof current flux, so that a constant voltage versus time integral will befed to the control winding at least during the one resaturation of thedriver core. With respect to the temperature compensation it is ofadvantage to use driver and transfiuxor cores of the same kind ofmaterial. In order to effect the setting of the transfluxor by means ofonly one resaturation of the driver core the dimensions of the coreshould appropriately be chosen such that the product of cross-sectionand number of turns is half as big for the driver core as for thetransfiuxor. If the setting is supposed to be eliected only after 11resaturations of the driver core then, however, the circuit arrangementis to be dimensioned in such a way that the products of thecross-section and the number of windings with respect to the transfluxorand the driver core have a relationship such as 1:211.

The circuit arrangements according to the invention are particularlysuitable for the construction of shifting registers. Such shiftregisters, of course, may also be operated as counting devices orconnecting-through devices (linkaccess switching devices) fortransmission paths, hence for example, as channel switches.

In general, a shifting register which is constructed with the aid oftrausfluxor circuits according to the invention, is laid out in such away that there is provided one singleapertured driver core and onetransfluxor for each register stage, and in that an output windingapplied to the transfluxor of the one stage is connected with an inputwinding of the single-apertured driver core of the next successivestages.

In the following various exemplified embodiments and further details ofthe invention will be described in particular with reference to FIGURES1 to 7 of the accompanying drawings, in which:

FIGURE 1 shows a transtluxor comprising two borings;

FIGURE 2 shows a circuit arrangement according to the invention in whichthe single-apertured driver core is set by pulses;

FIGURE 3 shows a circuit arrangement in which the single-apertureddriver core is set by direct-current;

FIGURE 4 shows a shifting register comprising transfiuxor circuitsaccording to FIGURE 2;

FIGURE 5 shows a shifting register comprising transfiuxor circuitsaccording to FIGURE 3, in which together with the withdrawal of theuseful signal the setting of the single-apertured driver core iseffected;

FIGURE 6 shows a shifting register comprising delay circuits or delayline elements and only one stepping line for cases Where the driver coreis set by pulses; and

FIGURE 7 shows a shifting register comprising delay line elements andonly one stepping line for cases where the driver core is set bydirect-current.

According to the present invention the transfluxor is set by a signalhaving a predetermined voltage versus time integral characteristic. Thevoltage versus time integral signal is taken from a single-apertureddriver core upon the resaturation thereof by a pulse of high energy. Tothis end an extracting or readout winding of the driver core isconnected with a corresponding control winding of the transfluxor. Inthe course of this, however, care will have to be taken that abacksaturation of the driver core remains without a reaction upon thesetting of the transfiuxor. For this reason, as is shown in FIGURE 2,the circuit arrangement can be made in such a way that the resaturationpulses are only capable of being transferred in the one direction fromthe driver core to the transfluxor, in that the output winding W2 of thedriver core is connected via a diode G with the control winding 1 of thetransfluxor.

Structure and mode of operation of such an arrangement will be describedin the following with reference to FIGURE 2. This circuit arrangementcomprises a single-apertured driver core K1 and a transfluxor K2. Thedriver core K1 is provided with the input windings W1 and W3, as well aswith anoutput winding W2, while the transfiuxor K2 is provided with twocontrol windings S1 and S2, and with an output winding 02, all three ofwhich enclose or surround the yoke I. In addition thereto thetransfiuxor K2, over the yoke III, carries a call-up winding e and areadout winding a. As already mentioned hereinbefore, the windings W2and S1 are connected via the diode G with a circuit which is completedor closed in the one direction.

For determining a defined starting point, it is assumed, that at thebeginning, strong restoring pulses have been applied to the windings W3and S2, so that the driver core K1 and the transfiuxer K2 are in thestate of a negative remanence, i.e. that the transfluxor is in theunoperated state. Now when applying a resaturation pulse via the windingW1 to the driver core K1, by which the core is completely resaturatedand thus transferred to the state of the positive remanence, an outputpulse will appear at the winding W2, having a predetermined voltageversus time integral characteristic. This output pulse is transferredvia the diode G to the control winding S1 of the transfluxor, foreffecting the setting thereof. By the pulse applied to the controlwinding S1, the transfiuxor is partly resaturated. Since theresaturation progresses from the inside towards the outside, the yoke IIis in the state of a positive remanence subsequently to the setting,while the yoke III remains in the state of negative remanence, if,according to the invention, the cross-sectional dimensions of K1 and K2have been chosen correspondingly or in a suitable way. It has alreadybeen mentioned hereinbefore, that these dimensions can be chosen suchthat only several resaturations of the core K1 will effect the propersetting of the transfluxor, hence just the complete resaturation in theyorke II, to the state of positive remanence. During the setting of thetransfluxor via the control winding $1 an output signal of somewhatuncertain voltage versus time integral characteristic may be derived viathe additional output winding a2. An output signal with an oppositepolarity will be obtained at the output winding a2 whenever thetransfluxor, subsequently to the setting by a restoring pulse, isblocked or rendered unoperated by the control Winding $2. Thisadditional output winding a2, however, may also be omitted whenever theaforementioned output signals are not required in the arrangement forany other purposes.

When the transfluxor is in the set condition, then the core material,surrounding the boring 3, can be resaturated. For example, when applyingto the input winding e of the transfluxor an alternating voltage, thenthe output winding a will deliver a relatively big output signal.However, if the transfluxor is in the unoperated state, then in both theyokes II and III the same direction of flux exists, and the resaturationof the material within the surrounding of the boring 3 is renderedimpossible.

The application of an alternating voltage to the input winding e willthen cause no output signal to appear at the output winding a.

If, subsequently to the blocking of the transfluxor, the transfluxor isto be reset via its control winding S2, then prior thereto the drivercore K1 has to be resaturated again to the state of negative remanence,for instance, by the application of a restoring pulse via the windingW3. Upon back saturation of K1 a signal will likewise appear at theoutput winding W2 corresponding to the change in flux. However, thissignal has an opposite polarity and, therefore, cannot be transferredvia the diode G to the control winding S1 of the transfluxor.

Instead of restoring the driver core via the winding W3, the restorationmay also be etfected via the winding W1 by the application of pulses ofan opposite polarity.

With reference to FIGURE 2, first of all the case according to which thedriver core K1 is operated in both resaturation directions by impulseshas been discussed, so that in the coupling loop between the driver coreand the transfiuxor the transmission pulse had been suppressed in therestoring direction by the action of the diode G. According to a furtherembodiment of the invention, however, the coupling circuit between thedriver core and the transfluxor can be completed in both directions ofthe current flow, when taking care that the restoring of the driver coreor its setting is performed so slowly that the change in flux withrespect to time in the output winding W2 will only affect an outputsignal of such a small amplitude that this pulse will remain ineffectivewith respect to the transfluxor.

One such type of circuit arrangement is shown in FIG- URE 3 of theaccompanying drawings. The cores K1 and K2 again are provided with thesame windings as in FIG- URE 2, with the exception that in this case theoutput Winding a2 of the transfluxor has been omitted. In parallel withthe input winding W1 of the driver core there is connected a capacitorC, the one plate of which is applied directly and the other plate ofwhich is applied via the diode D to the terminals of the lead-inconductor e1.

Also in this case it is assumed that in the initial condition the drivercore K1 and the transfluxor K2 are in the state of negative remanence.Now when applying an alternating current from a source of small internalresistance to the lead-in e1, the capacitor C will be charged. In thecourse of this charging a direct current will gradually appear in thewinding W1, by means of which the core K1 is relatively slowlyresaturated. Subsequently to the cutting-off of the source ofalternating current from e1, the core K1 will remain in the state ofpositive remanence. During the resaturation of the core K1 a currentproportional to the flux variation do/dt will flow in the couplingcircuitconstituted by the winding W2 and S1. This current is so smallthat the state of remanence of the transfluxor will remain unchanged,i.e. that the transfluxor will remain unoperated. When returning, thedriver core to the output or starting condition by a strong pulse viathe input winding W3, then an output pulse will be transmitted from W2and S1 and the transfluxor will be set accordingly. In the case of a newblocking of the transfluxor, care will have to be taken that itsrestoring to the condition or state of negative remanence will remainwithout influence upon the driver core K1. For this reason it is ofadvantage to limit the restoring current, as applied to the controlwinding S2, in such a way that the change in flux will only beeflfectedslowly during the resaturation, and that only correspondingly smallcurrents will be induced in the coupling circuit between K1 and K2. Ifit is intended to operate the blocking of the transfluxor likewise withthe aid of strong pulses, then, by means of a corresponding attenuatoror damping element in the coupling circuit between W2 and S1, thereaction of the transfluxor upon the core K1 will have to be limitedcorrespondingly, by taking e.g. from the output of K1 a high voltageversus time integral, and by feeding only a fraction thereof to thesetting winding S1 of the transfluxor, so that, in the other way round,the voltage versus time integral as supplied upon blocking of S1, willalso only be transferred to a small extent to the winding W2.

In the set condition or state, just like in the circuit arrangementaccording to FIGURE 2, upon application of an alternating voltage to thecall-up winding e, a useful signal may be taken from the transfluxor viathe readout winding a.

In FIGURES 4 to 7 various embodiments suitable for the construction ofshifting registers consisting of circuit arrangements according to theinvention are shown. The shifting register as shown in FIGURE 4- iscomposed of circuit arrangements according to FIGURE 2. For eachregister stage there is provided one single apertured driver core andone transfluxor, of which respectively two are shown in FIGURE 4.According to a further embodiment of the invention the output winding a2of the transfiuxor of the one stage is respectively connected via adiode G1, permitting a passage in the shifting direction, with the inputwinding W1 of the driver core of the next successive stages. The controlwinding S2 of the transfluxors and the input windings W3 of the drivercores of all stages are respectively separately connected in series, andare connected with two stepping or transfer lines 121 and 12.

This arrangement is operated in such a way that the stepping or transferpulses are alternately applied to the stepping or transfer lines p1 andp2. Thus by means of a first stepping or transfer pulse on the line p1,all transfluxors are blocked simultaneously. If one of the transfluxors,prior to the blocking, has been in the set condition, then, via therectifier G1, an output signal is transmitted from the output winding a2of this transfiuxor to the input winding W1 of the next successivedriver core, so that the information previously stored in thetransfluxor is transferred to this core. By the following secondstepping or transfer pulse on the line p2, the driver core is thenreturned to the initial condition again and, in the course of thisoperation, an output signal is transferred to the next successivetransfluxor via the diode G, so that the latter will be set thereby.Therefore, if, for instance, prior to the blocking, the transfluxor Kthad been in the set condition, then K0 will be blocked by the firststepping or transfer pulse and the driver core K1 will be resaturated.By the action of the second stepping or transfer pulse, K1 will beresaturated and the transfluxor K2 will be set. However, if prior to theblocking, K0 had not been set, then the first stepping or transferpulse, i.e. effecting the blocking of K2, will not effect a change influx in K0 and, consequently, no resaturation of K1, so that after thesecond stepping or transfer pulse has been applied to the line p2, K1 isprevented from being resaturated and, in consequence thereof, will alsonot transmit an output signal for the setting of K2.

By the stepping pulses or transfer pulses on the lines p1 and p2, thestored informations are alternately transmitted from the transfluxorsinto the driver cores, and from these again to the next successivetransfluxors. In the course of this operation the information is tappedat the transfluxor, if the transfluxor is blocked.

However, the arrangement can also be made in such a Way that the tappingof the information at the transfluxor is effected together with thewithdrawal or extraction of the useful signal (reading signal). Acorrespondingly designed shifting register is shown in FIGURE 5. Also inthis arrangement one transfiuxor and one single-apertured driver core isprovided for each register stage, the circuit arrangement of whichcorresponds to the circuit according to FIGURE 3. The coupling of theindividual stages is carried out in this embodiment according to theinvention in such a way that the readout winding a of the transfluxor ofthe one stage is connected with the leadin el of the driver core of thenext successive state, and in that in each case the control windings S2of the transfluxors and the input windings W2 of the driver cores of allstages are separately connected in series for forming one stepping ortransfer line p1 or p2 respectively. For the operation of this circuitarrangement and for each stepping or transfer process, a first steppingor transfer pulse is fed to the one stepping or transfer line p1 servingthe blocking of the transfluxors of all stages, and thereupon, a secondstepping or transfer pulse is fed to the other stepping or transfer linep2 serving the interrogation or calling-up of the driver cores, and thecorresponding setting of the transfluxors.

In order that no information is lost between two successive stepping ortransfer processes, it is necessary to feed to the input or call-upwindings e of all transfluxors an alternating-current voltage fortapping a useful signal at the output end via the windings a and foreffecting the direct current setting of the driver cores via the diodesD and the capacitors C, as well as via the windings W1. Accordingly,this circuit arrangement will be mainly employed in this particularapplication when a reading cycle follows each stepping or transferprocess.

In accordance with the further embodiment of the invention the couplingloops between the driver core and the transfluxtor may also be laid outin such a way that the shifting registers which are constructed of thetransfluxor circuit, can be operated with one stepping or transfer lineonly. To this end it is of advantage to insert into the coupling loop,i.e. between the output winding W2 and the control winding S1, and afterthe rectifier G, a time-delay circuit LC. In FIGURES 6 and 7 there areshown correspondingly designed shifting registers. In the shiftingregister according to FIGURE 6, which is laid out for the pulse settingof the driver core, a time delay circuit LC is arranged in the couplingloops after the rectifiers G, and after the rectifiers G1. The controlwindings S2 of the transfluxors and the input windings W3 of the drivercores are alternately connected in series, thus forming a commonstepping or transfer line p. By the application of stepping or transferpulses, all of the transfluxors will be simultaneously blocked, and allof the driver cores will be interrogated. If one transfluxor prior tothe blocking had been in the set condition, then an output signal is fedvia the rectifier to the subsequently arranged timedelay element LC, andsubsequently to the decay of the stepping pulse, this output signal isstored in the subsequently arranged driver core. If, on the other hand,in one of the driver cores an information had been stored, then anoutput signal will be produced by the stepping pulse, which is fed, viaa diode G, to the subsequent time-delay circuit LC, for effecting thesetting of the subsequently following transfiuxor via the controlwinding S1 subequently to the decaying of the stepping pulse.

Such a shifting register according to the invention may be fundamentallyoperated in two different ways. The first mode of operation requires twostepping pulses for each stepping or transfer process, which aresuccessively applied to the stepping or transfer line p. In the courseof this operation the driver cores merely serve as auxiliary cores orintermediate storage devices, while the actual signal or usefulinformation is only stored in the transfluxors. By the action of thefirst stepping pulse the total useful signal is transferred from thetransfluxors to the driver cores, and in the course of a second steppingcycle, again from the driver cores back to the transfluxors. In thecourse of this operation, and after the first stepping pulse, andsubsequently to the restoring process which is delayed by the time-delayelements, the information contents of all transfluxors is zero, andafter the second stepping pulse, the information contents of all drivercores is zero. In this manner of operation, the shifting registeroperates with respectively one driver core and one transfluxor per hit.

However, in a second manner of operation, this shifting register mayalso be operated in such a way that one bit is stored per driver coreand one per transfluxor. In this case, with respect to a shiftingregister, according to FIGURE 6, only every second bit is capable ofbeing read in a non-destructive manner. Fundamentally, such a shiftingregister corresponds to a shifting register employing normal types ofcores, in which likewise one core per bit is provided. In many cases,the requirement that each stage of the register is capable of being readdoes not even exist. In many cases, the read-out of the last stage ofthe register is all that is required. In other cases, for instance thebinary multiplication of dual numbers with the factor 10, represented ina serial notation, it is only necessary to said the n and the (n--2)register stage. However, in this case Only these two stages will employtransfluxors instead of normal types of cores. In this form the circuitarrangement according to the invention may be employed with all cases ofpractical application where the reading points are not lying in directlyadjacent register stages.

A further embodiment with only one stepping line is shown in FIGURE 7.In this shifting register likewise, a time-delay circuit LC is insertedinto the couplng loop between the core and the transfluxor and after thediode G, while the direct-current setting of the single-apertured drivercore is eifected via the output winding of the transfluxor of thepreceding stage in the same manner as with the shifting registeraccording to FIGURE 5. Also in this case one driver and one transfluxorare provided for each register stage, i.e., for each bit. Between twosuccessive stepping pulses a call-up signal has to be fed to thetransfluxor via the input winding 2, in order that no information goesastray, because otherwise the transfluxors are merely blocked by thestepping pulses, and the information is called up from the driver cores,but not the information as previously stored in the transfiuxor, i.e.this information is then not transferred to the driver core. Shiftingregisters of this kind are particularly suitable for employment Whenevereach stepping pulse is followed by a reading cycle.

While I have described above the principles of my invention inconnection with specific apparatus, it is to be clearly understood thatthis description is made only by way of example and not as a limitationto the scope of my invention as set forth in the objects thereof and inthe accompanying claims.

I claim:

1. A transfluxor circuit, for use in storage devices, counting chainsand shifting registers, comprising a transfluxor core having a controlwinding and an output winding, means for saturating said transfluxorcore in one direction of its remanence, a single-apertured magneticdriver core having a rectangular hysteresis loop and having an inputwinding and an output winding, means for saturating said driver core inone direction of its remanence, means for applying resaturation pulsesto said input Winding of said driver core of sufficient amplitude tosaturate said core in the opposite direction, means for connecting saidoutput winding of said driver core and said control winding of saidtransfluxor core in a circuit closed at least in one direction ofcurrent flux, so that a signal having a. predetermined voltage versustime integral characteristic will be fed to said control Winding of saidtransfiuxor at least during the one resaturation of said driver core byvirtue of the non-critical saturation and resaturation action of saiddriver core.

2. A circuit arrangement, as claimed in claim 1, in which both thedriver and transfluxor cores consist of the same kind of material.

3. A circuit arrangement, as claimed in claim '1, in which the circuitarrangement is so dimensioned that the product of the cross-section ofthe driver core at the out- 8 put winding and the number of turnsthereof has the relationship to the product of the cross-section of thetransfluxor core at the control winding thereof and the number of turnsof said control Winding as 12211, wherein n denotes the number ofresaturations which are necessary for effecting the setting of saidtransfiuxor core.

4. A circuit arrangement, as claimed in claim 1, in which the product ofthe cross-section of the driver core at the output winding thereof andthe number of turns of said output winding is half as big as the productof the cross-section of the transfluxor core at the control winding andthe number of turns of said control winding, so that said transfiuxor iscapable of being set by only one resaturation of the driver core.

5. A circuit arrangement, as claimed in claim 4, in which the inputwinding of the driver core is used for feeding-in the resaturationpulses of the other direction, the means for saturating said driver corein the one direction comprising a second input winding for feeding-insaturation pulses, and in which the control winding of the transfluxorcore is for receiving the setting pulses of the other resaturationdirection, and the means for saturating said transfiuxor core in the onedirection comprising a second control winding for feeding-in thesaturation pulses.

6. A shifting register, as claimed in claim 5, further comprising adiode in each stage in the connecting means between the driver core andthe transfluxor, and a timedelay circuit connected between, each diodeand the associated transfluxor core, and in which the means forconnecting the control windings and the input windings of all stages areconnected in series for forming one common transfer or stepping linecircuit.

7. A circuit arrangement, as claimed in claim 5, in which the means forapplying the resaturation pulse to the input winding of the driver corecomprises a diode connected in series with said input and a capacitorconnected in parallel across said input winding at the juncture of saidwinding and said capacitor, whereby alternating current may be appliedto said input winding.

8. A shifting register comprising circuit arrangements, as claimed inclaim 7, in which there are a plurality of register stages, there beingone transfiuxor core and one single-apertured driver core for eachstage, means for connecting the output winding of the transfiuxor ofeach stage with the input winding of the driver core of the nextsuccessive stage, means for connecting the second control windings ofthe transfluxors in series to form one stepping line, means forconnecting the second input windings of the driver cores of all stagesin series to form one transfer line, the means for saturating thetransfiuxors and the driving cores comprising means for feeding a firststep ping pulse to the one stepping line for effecting the saturation ofthe transfiuxors of all stages and means for thereupon feeding a secondstepping pulse to the transfer line for effecting the interrogation ofthe driver cores and for the corresponding setting of the transfluxors.

9. A circuit arrangement as claimed in claim 5, further comprising adiode connected in the circuit connecting the output winding of thedriver core and the control winding of the transfiuxor core to permittransfer of the setting pulses in the forward direction.

10. A circuit arrangement, as claimed in claim 9, in which thetransfiuxor core is provided With an additional output winding,surrounding the smallest cross-section of said core which is used forthe setting purpose, so that at this winding output pulses may be tappedwhen the transfiuxor is resaturated.

11. A shifting register comprising circuit arrangements, as claimed inclaim 10, in which there are a plurality of register stages, there beingone single-apertured driver core and one transfluxor core for eachregister stage, means including a diode, conductive in the shiftingdirection, for connecting the output winding of the transfluxor core ofeach stage with the input winding of the driver core of the nextsuccessive stage, means for connecting the second control windings ofsaid transfluxors in series to form one stepping line, and means forconnecting the second input windings of said driver cores in series toform one transfer line, the means for saturating the transfluxors andthe driving cores comprising means for feeding pulses alternately tosaid stepping and transfer lines.

12. A shifting register, as claimed in claim 10, further comprising atime delay circuit included in the connecting means between thetransfluxors and the driver cores, and between the driver cores and thetransfluxors, after the diode and in which the means for connecting thecontrol winding of the transfiuxor core and the input winding of thedriving core of all stages connects the Winding in series, so that theywill form one common stopping or transfer line.

References Cited UNITED STATES PATENTS 3,068,462 12/1962 Medofi 340-174BERNARD KONICK, Primary Examiner.

I. W. MOFFITT, Examiner.

